Electric switch



l 1,525,972 VC. J. ZIGLER ET AL ELECTRIC SWITCH Filed April le, 1921 2Sheets-Sheet l Feb. 10, 1925.

C. J. ZIGLER ET AL,

ELECTRIC SWITCH 2 Sheets-Sheet 2 clip an elongated hole 31 to receivement 'of the extremities of the arm 1 6 with the clips Q9 on thc crosshead bar 10 will operate the switch depending upon the direction ofmovement of the shaft 15. The. extremities of the blades 7 make a springcontact with the jaws S and if a sutlicient Contact is not made with thejaws the spring- 2G is operative to pull the blades out of eontact withthe jaws. This is for the purpose of insuring that a proper andsufficient coutact is made.

The construction thus described has a nick throw action as will be moreapparent rom Fig. 4 for the arms 1G have both a sliding and aturningengagement with the clips 29 and the radius ot' the arm 1G whereit engages the cross head clip 29 ot' blade 7 is less than the length otthe blade that engages the Contact jaws S. The result of this is thatthe circumterenceor arc of move- Ament of the arms 1G is less in lengththan that of the contact blades T, and as the axis of the shaft 18 iseccentricto the pivot point of the blades; 7, a differential cornice-.-

tion is made by the. arr'ns 16 and clipsl 29 which produces .the morerapid movement 'of the switch blades T, thereby causing'a quick make andbreak connectionot the.

yFreni this description-it will also be seen that We provide an enclosedswitch construetion having an operating 'shaft which is straightthroughout its' Ientire, llength within the box. This -notI onlyless'ensl the cost ot' construction but, taken with the means forconnecting the sameto 4the switch, overcomes a number of' objectionablefeatures o' the prior constructions of this same general character. Forinstance, with switches having shattswhicli are lbent Within the box theopening mechanism for giving a quick break to the switch blades. Thesesprings have been :tou'nd to jar the mechanism Whenever the switch isopened and such jarring is apt to loos'en the different parts or causeother, injury.' Vith our improved construction the straight shaft is notap-t to tbend and furthermore the elimination of the springs avoids thedifficulties incident l to such constructions.

vWe claim:4 v j 1. A device of the character set forth comprising acasing having a knife switch mounted therein, a shaft whichv is straightthroua'hout its len orth within the casinfr ivt b D? 2. device of. the,character set orth,'

comprising a box, a knife' switch mounted in said bok, a shaft extendingthrough the box and pivoted therein adjacent te the hinges of the switchblades, said shaft being. i

straight throughout its length Within the box, a .handle for thelshaitt.arranged ein terioi'ly of the box andnteansfcounecting theshaft' with the switch, whereby .the

switch. will be opened land closed by tuij-iiing the'fshaft.

f3. In u switch construction, the combina# tion of a box having' aswitch blade pivotally' mounted therein, a straight shaft passingthrough the box adjacent. to the pivot v 'ot' the blade :ind rotatabl)v.mounted `iii the box. means tor turning" said shaft, an arm such thattheclip will slide along therarni as the'arm is moved to open or closetheblade. q .y

4. ,A switch construction,comprising a casing, a knife switch mounted insaid cas.

ing, said switch having; a plurality of pivoteldblades, a' cross bar`connectingsaid blades intermediate ot' their ends, clips on said crossbar, a straight' sliaftjtiivotally mounted in the casing' vadjacent to.the

at y on the sha'it and a clip` connected with the blade', said cliphaving 'an openingT for receiving the arm, the arrangement being,`

hinges of the blades and one or more arms secured to the shaft, cach ofsaid arinsfengagging with a hole in Va corresponding,` clip, whereby theswitch will be opened or closed as the shaft is turned. v

5; The combination with a pivoted'switch blade, a resilient engagingcontact, of a receptacle therefor, a shaft piVota'lly mounted in thereceptacle, an arm projecting fromA said shaft,1 a sliding connectionbetween the arm and the blade, and a resilient connection between thebox and the .operating fie member tofthrow the blade out ofengagenientwith its Contact when its Contact does not suflicientlyengage it. I

6. The combination with a. knife switch having an insulating `crosshe'ad, of a. switch containing receptacle, switch iiieans comprising astraight shaft rotatable in the receptacle, an armen the shaft having adifferential connection with the"l cross operating head, and insulatingsleeves mounted on the 13 `treinty of the arm adapted to be continuouslyand si'idehiy connected to the heded 4portion of the switch fordii'crentielly operating the switch 'when the she-ft ie turned.

8. The combination with e -z-nivitch box having e hinged cover, a siotin the eide of the boit adjacent the 'tree edge of the cover, of aswitch operating shaft mounted in the box and inserteble through thealot thereof., e. piete to hold the shaft in piace attecheble at nesides of the slot and projecting above the edge of the. box with an eyein the loro jecting end, the cover being termed with .e perforationwhich slips over the projecting end of the plate, and en erm inconnection y with the sha-.tt having en eye web registers with theeye'oi said plete to ieceive e com mon locking member.

9. The combination with a knife switch, of e. 'nox in "which it ismounted an opereting attachment .'thereor, said attachment having' etumbler shaft with e. crank end. extending outside the box, an operatingerm' attached to the shaft, und e member in sueted from the switch bladeand having an elongated perforation through which the operating ermextends to 1Ecrin e continuons sliding diierential l connectiontherewith when theshait is rotated.-

lG. A switch operating attach-.nent for knife switches' comprising eStr-.iight shaft with a. crank handle at one end, en operating ermattached to and projecting from the shaft, Ineens to form e varyingdiiferentiel connection between the rec end of said erin and the switch,and n spring ettachehic to the shaft end to some fixed part for ontoeinuticeily operating the attachment when the 1enie 'switch does notsncienty eng-ege ite contacts.

C: A D en operating device igor the switch 11. The combination with eswitch and e receptecie therefor having e hin ed iid, of having o crankerm outside of the ocx with en eye at the outer end, a plete attached tothe eide of and extending through the iid of the box when it is ciosedhaving an ege which registere Wim the eye 'of the erm, forming econnection between the operating devices and the switch, ineens engagingthe eyes of the plete end the crank erm for docking the hd closed endfor locking the open-ting member in open. poeition when the lid is openor ciosed.

i2. The combination with e. Switch having pivoted olefes sind eninsulating c'rose heed7 of en operating member 'thereor comprising e.roteteole Shet, arms mnted on the shat between the bieden inni-tegsleeves enrrounding the shaft hete' i the crine. for .insnieting it fromthe swmz-h. hiedes, e perforated part through which each of' the ernisis eiidabe Without iost motion, ineens for ottechjng seid parte to thecrose heed, and means for rotating the ehet to operate the switchthrough the cross heed connection.

13. Aswitch having a'pivoted blade, ot en eccentrcalijg pivoted tumhershaft, and ineensliorming e positive end sding diien ential turningconnection between the shefand the blade for accelerating the movementof the letter with i'espect'to the shaft.

14. The combination with e switch hol; having e. hinged cover with .eiidA in the ire@ edge thereof and e. projection exten-ding; through thesot when the cover is closed. with. en eye in the projecting portion, ofa switch operating shaft mounted in the box having e. crank erm with eneye et the end which registers with the eye oi the seid pio jee-tion toreceive e common iociring member.

l5. A switch construction comprising o metal enclosure with e knifeswitch mounted therein, e. shaft pivoted in said encloenie, connectionsfrom the shaft to the switch for operating the switch and insulation onthe shaft adjacent to the switch parte.

CHARLES J. ZG-LER. WLLIAM P. HULDEN.

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